I went to Dunkirk yesterday at the IMAX. Visually, it was amazing. The story was very good and I liked the way time was portrayed - even though it was neither chronological nor flashback based, it was easy to understand what was going on and it added to the details which could be expressed in the full story-line. I liked that. The images on the 70mm IMAX projector was stunning - nothing I have seen comes close to the quality of what I saw in this movie, like ever.
The music score by Hans Zimmer was great, the actors were spot on and there were no "that's gonna be your star" moments (which I grew annoyed with in Hollywood movies so long ago).
I did NOT like the use of bass in the soundtrack. What started as a rather loud extreme rumble at the very start of the gunfire just as the movie started (which was shockingly powerful and somewhat painful) pretty much didn't let up throughout the entire movie. The bass pretty much peaked at the 2 minute mark and remained at that level throughout the movie. Only rarely did it stop, which was impactful in telling the story, but it was overbearing and distracting about two thirds of the time it was rumbling away. It was so loud that there were many moments where the dialog, of which there was very little, couldn't be heard at all and I had to interpolate what was said by what happened or was said after. It was insane.
At no point could I differentiate between real footage and CGI. I wanted to believe certain scenes were CGI because I couldn't imagine how they filmed it, but I that was the only clue that something may not have been real - but I've seen documentaries on similar large scale movies where big complex scenes were real when I thought they were not due to the size of the sets and numbers of extras. So, I was just guessing if I ever thought something couldn't have been real.
I was very moved by the sentimental acts of bravery and courage, and I felt the fear and terror when the bullets, bombs, and torpedoes were flying. It was an intense film.
I do recommend it, and I recommend you see on 70mm if you can.